George lee



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' G. LEE.

HYDRAULIC ELEVATOR. V

No. 574,338. Patented De0.29,189 6.

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713122011572 mmmw mw UNITED STATES PATENT OFFICE.

GEORGE LEE, OF DUNEDIN, NEVVZEALAND.

HYDRAU LIC ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 574,338, dated December 29, 1896.

Application filed August 8, 1896. Serial No. 602,174. (No model.)

To all whom it may concern:

Be itknown that I, GEORGE LEE, mine-manager, a subject of the Queen of Great Britain, residing at 31 Moray Place, city of Dunedin, in the British Colony of New Zealand, have invented a new and useful Improved Hydraulic Elevator for Mining Purposes and such Like Elevating, of which the following is a specification.

The object of the invention is to get a greater amount of. effective force in an ordinary hydraulic elevator. This is'done by making the opening that receives the dirt (or material to be raised) oval instead of round, so as to bring the jet nearer its work, and also incombination with this to get decreased friction of the ascending mass of water and wash-dirt by the introduction of a constant stream of air under pressure, the same being introduced to the contents of the elevator at a point between the opening and the throat.

Referring to the accompanying drawings, Figure 1 is a section of an ordinary hydraulic elevator with-the part of the invention for forming the current of air shown in position. Fig. 2 is an end view of same, showing the oval opening.

A is the opening or intake, which by being made of an elliptic or oval shape allows the jet to be brought up nearer to the throat 13 without decreasing the relative area of a given elevator.

O is the usual pipe feeding the jet with water in the usual way, only the jet is nearer the throat, as mentioned.

D is the high-pressure jet.

E is a pipe placed in any convenient part of the opening, such as shown. Air is forced through this pipe by any means, but, as there is water under pressure, preferably in the manner shown on the drawings, where the pipe E ends in a funnel F, and a pipe G, ending in a jet, is directed into the said funnel F, thus forming what is known as a waterblast, and which forces a body of air and a little water (from the jet) into the openin g A. The action of the air thus forced in is such as to form a cushion principally between the mass of ascending material and the inclosing pipe and at the same time to lighten the mass and thus reduce the friction in the elevator.

I am aware that air has been admitted hehind the jet; but owing to its not having been forced into the elevator it quickly choked and became useless, whileso little ever got in that it has generally been abandoned where tried.

What I claim as my invention, and. de sire to obtain by Letters Patent of the United States, is-- 1. In a hydraulic elevator, the combination with the elevator-pipe having an oval-shaped intake, of a jet communicating with said pipe, said jet being arranged at a right angle to the major axis of the oval-shaped intake, substantially as sh own and described and for the purpose specified. v

2. In a hydraulic elevator, the combination of an oval opening A, with a pipe for the introduction of air under pressure E, F, G, substantially as shown and described.

3. In a hydraulic elevator, the combination with an elevator-pipe having a contracted throat B and an oval-shaped intake A, of a jet D communicating with said elevator-pipe, said jet being arranged at a right angle to the major axis of the intake and in alinement with the elevator-pipe, substantially as shown and described and for the purpose specified.

GEORGE LEE.

Witnesses:

I-IEN'roN MACA'ULAY DAVEY, CHARLES EDWIN DAVEY, 

